“That’s it at Last.”

Brace Norton’s heart told him truly: the noise was the grating of a diamond over glass, and it was repeated four times. Then there was a pause, ere at the end of a few minutes came a dull, snapping noise, and one faint tinkle as of falling glass upon the ledge of a window.

He stopped, listening attentively, for he seemed by instinct to know what would follow; he almost seemed to pierce the black darkness ahead, and to see an arm passed through a cut-out pane of glass—a fastening thrust back. Yes, there was the dull snap, and now the raising of the sash. No, it could be no sash, for there was a dull creaking as of the rusty hinges of an old iron lattice casement. Then came a soft rustling. Yes, that was the stranger drawing himself up, and passing through the window.

Would he fasten it after him?

No; it was evidently left open, and all was still. It must be some one who knew the place. What should he do? try and alarm the house? No; he did not fear one man. There was some mystery here; and at the thought of that word mystery, as it seemed to come with a dull impact upon his heart, that heart throbbed and beat still more rapidly, for a strange influence connected mystery with mystery; and Brace Norton, mad almost with excitement, followed to where he had heard the sound, felt in the intense darkness for the window, found it as he had expected—open, and drawing himself up, he leaned in, and listened, half feeling that it was but to receive a fierce blow upon the head; but, no: all was still.

“I’ll risk all,” muttered Brace. “My position as an officer, and my word of honour that I was impelled by good motives, must be sufficient to clear me from all blame.”

The next minute he was in a small lobby—so he judged it to be—and feeling gently along the wall, he soon found the open door, and stood in what seemed to be a long stone passage—the passage, in fact, though he knew it not, which led from the servants’ offices to the grand entrance of the house.

Should he turn to right or left? All was dark and silent; but that a robbery was in progress he felt now sure. If, he thought, he could seize the burglar at his work, there would be some claim again on Sir Murray Gernon’s generosity; but if he tried now to alarm the inmates, and the burglar took flight, there was nothing but his own word to clear him from what would look to suspicious eyes like a clandestine entry to the Castle for reasons of his own.

Brace wavered for a few moments as he stood there listening in the black darkness; but directly after a strange impulse moved him to proceed; and cautiously feeling his way along, he stood at length at the foot of the grand staircase, irresolute as to the next direction he should take.

For a few seconds he could hear nothing but the loud tick of a clock somewhere close at hand, but directly after came a slight grating, which he knew to be a key turning in a lock; and gliding in the direction, he found an open door, through which he passed in time to hear a faint ejaculation, as some one brushed against a light chair. Then came once more the sound of key in lock, and Brace suspected that he must be in a suite of rooms, leading one from the other.

There was furniture all around, but by means of exercising great caution he was enabled to creep on slowly till his hand rested upon an open door, against the edge of which he nearly struck his forehead. On trying to the left, he found that his hand rested on a chiffonnière, his touch displacing a china cup and saucer standing upon the marble top. The sound was very slight, but it seemed to have alarmed the burglar, for as Brace stood motionless behind the door, there was a faint, very faint rustling sound, and a hard breathing coming nearer and nearer, till, as he shrank slightly back, he could hear the dull throb, throb of another beating heart, and he held his breath till the oppression was fearful.

He had but to stretch forth his hand to seize this midnight visitor, but something restrained him, and after a few minutes’ pause, the rustling and gliding sound recommenced; then came the faint rattle of a door-handle, and this time the slight creaking of hinges.

Brace crept round the door, and passed cautiously into another room, his every step measured with the greatest care, till, after traversing some distance of what seemed an endless journey amongst crowded furniture, he was almost in despair, regretting that he had not seized the man when within his reach, for he could find no door; but a minute later, and there was a soft rattle on his right—a sound as of some one lifting fire-irons from their place and laying them upon a soft rug; and, guided by the sound, Brace felt his way to another open door, and stood upon the long-piled carpet of another room, where he could again hear the hard breathing. There was a faint click, and what sounded like the fall of a standard, and then once more utter silence for full a quarter of an hour.

But at the end of that time, measured out by a chiming pendule upon the chimney-piece, the rustling again commenced; and, as Brace cautiously stepped two paces nearer, he could, mentally, see all that took place, as, with nerves strained to their greatest tension, he eagerly drank in each sound.

The rough visitor was upon his knees, moving the fender aside. Then there was the rustling, as of the removal of paper-shavings from the grate, and directly after the click, click of iron-work.

What could that be? What did it mean? The man must be at work at the grate. Was he a workman, in a state of insanity or somnambulism? This could be no burglar.

Yes, there it was again, the clicking rattle of the iron plate of a register-stove, followed by a faint puff of air, laden with that fine, impalpable soot from an unused chimney; and, as the excitement began to fade, Brace smiled bitterly, with something like contempt, for the pitiful conclusion of this romance. The man was, evidently, trying to ascend or reach up the chimney, for he could hear him groping about behind the iron-work; there was the rustle of little bits of falling mortar. The hard breathing had ceased, but there was the rustling noise of the man’s lower limbs, as he seemed to be straining hard to reach something, and at last came the sound as of his struggling down.

Brace, on smiling at the pitiful termination of his knight-errant’s quest, had crept closer and closer, until now he stood guardedly upon one side of the fire-place, for there could be no doubt respecting the sounds he had heard. The rustling continued for a few moments, and then the hard panting noise recommenced, followed by an unmistakable stifled sneeze, and directly after a voice muttered:

“Cuss the sut! But I’ve got it at last, though.”

Got what? Brace’s heart began to increase its rate, and the excitement, he knew not why, rapidly returned, as there was the sound of an opening box, a scratching, and a faint line of light appeared upon the fender.

“No go,” muttered the voice, and again there was the opening sound, and the scratch of a match upon the stone this time, for it commenced burning with its faint blue fluttering light before the splint caught fire.

At the same moment there was the sharp blowing, as of some one puffing dust from some object—the sooty dust, light as air, being wafted right in Brace’s face. Then the splint caught fire, and blazed up for an instant, but only to be quenched the next, as there fell, upon the young man’s ears the softly-muttered words:

“That’s it at last!”